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Monocacy Aqueduct
Mouth of Monocacy Road off Rt 28 near Frederick/Montgomery County line
Dickerson, MD 20842
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516-foot long with seven arches measuring 54-feet, this is the largest structure on the canal. Finished in 1833, it has survived Confederate attacks and damaging hurricanes. See "Parks and Outdoors" for C&O Canal information.
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